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On crystallization at the inner core boundary
http://hdl.handle.net/2261/4072
http://hdl.handle.net/2261/40726d85d00c-033a-4d39-b211-4c2800a3b68e
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Shimizu-PEPI05.pdf (332.7 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2010-03-15 | |||||
| タイトル | ||||||
| タイトル | On crystallization at the inner core boundary | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Inner core boundary | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | mushy layer | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | slurry | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | morphological instability | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | journal article | |||||
| 著者 |
Shimizu, Hisayoshi
× Shimizu, Hisayoshi× Poirier, JP× Le, Mouel JL |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 106652 | |||||
| 姓名 | 清水, 久芳 | |||||
| 著者所属 | ||||||
| 著者所属 | 東京大学地震研究所 | |||||
| 著者所属 | ||||||
| 著者所属 | Earthquake Research Institute, University of Tokyo | |||||
| 著者所属 | ||||||
| 著者所属 | Institut de physique du globe de Paris | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | It is widely believed that a mushy layer develops at the ICB while the outer core material freezes onto the inner core. This view is obtained in reference to metallurgical or analog experiments on solidification carried out in the laboratory where morphological instability almost always follows constitutional supercooling. However, morphological instability is not an automatic consequence of supercooling: supercooling and stable solid-liquid interface may coexist under certain conditions such as might perhaps occur at the ICB. If these conditions are realized, there could be both solidification on the ICB and crystallization of small solid particles in the supercooled layer (slurry layer). We made a linear stability analysis of a unidirectionally advancing solid-liquid interface under the ICB conditions. Several values of liquidus slope against concentration of light material (mc) are used for the stability analysis. It was confirmed that supercooling and interstability may coexist if |mc| is low although this value of |mc| is believed to be too small as the liquidus slope at the ICB. The estimated amount of supercooling in the layer is of order 0.1K, and this provides an estimate of the size and population of solid particles in the slurry layer. However, even though the value of |mc| is small, to sustain such slurry layer at the ICB is unlikely due to (i) the difficulty of continuous supply of enough number of nuclei into the layer and (ii) the Rayleigh-Taylor instability by the compositional buoyancy. It is most probable that mushy layer exists at the ICB. | |||||
| 書誌情報 |
Physics of the earth and planetary interiors 巻 151, 号 1-2, p. 37-51, 発行日 2005-07 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 00319201 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA00773963 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.1016/j.pepi.2005.01.001 | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 著者版フラグ | ||||||
| 値 | author | |||||
| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| 関係URI | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.sciencedirect.com/science/journal/00319201 | |||||
